TABLE 1.

Relationships between transposon transposition modules^a

Transposon	% Identity with:
	Tn1013	Tn4656	Tn4653	Tn501	Tn1721	Tn21	Tn1696
Tn1403	94.6	93.2	91.9	90.6	90.5	73.3	73.2
Tn1013		92.7	91.9	91.3	91.3	73.2	72.8
Tn4656			92.1	90.8	90.5	73.1	72.9
Tn4653				94.1	93.3	73.6	73.0
Tn501					95.6	74.2	73.9
Tn1721						73.6	73.2
Tn21							81.5

^aThe numbers represent the percent nucleotide identities between the transposition modules. For the GenBank accession numbers, see the legend to Fig. 2.